CN217060421U - State detection circuit of alternating current control loop and electrical equipment - Google Patents
State detection circuit of alternating current control loop and electrical equipment Download PDFInfo
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- CN217060421U CN217060421U CN202123031049.8U CN202123031049U CN217060421U CN 217060421 U CN217060421 U CN 217060421U CN 202123031049 U CN202123031049 U CN 202123031049U CN 217060421 U CN217060421 U CN 217060421U
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Abstract
The utility model relates to a state detection circuit and electrical equipment of an alternating current control loop, which comprises a control module, an alternating current control module and a detection module; the output end of the alternating current control module is connected with a load, the input end of the alternating current control module is connected with the control end of the control module, the detection end of the detection module is connected with the load, and the signal output end of the detection module is connected with the input end of the control module; the alternating current control module outputs a driving signal to a load according to the alternating current control signal; the detection module detects the state of the alternating current control module and outputs a detection signal to the control module; the control module outputs an alternating current control signal and determines the state of the alternating current control module according to the detection signal. The utility model discloses a simple circuit structure can realize carrying out on-line measuring to the state of AC control return circuit, and circuit, wiring are simple, effective reduce cost, and detect the good reliability.
Description
Technical Field
The utility model relates to an electrical technology field, more specifically say, relate to a state detection circuitry and electrical equipment in AC control return circuit.
Background
When existing electrical equipment such as a water pump, an intelligent door lock, a heater, a water inlet valve, a motor, a fan, a washing machine and the like is electrified, in order to guarantee use safety, on-line detection is generally needed to be carried out on an alternating current control loop.
However, in the existing ac control loop online detection method, the circuit structure design is complex, the number of lines is large, the wiring difficulty is high, and the cost is high.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art's defect, provides an alternating current control loop's state detection circuitry and electrical equipment.
The utility model provides a technical scheme that its technical problem adopted is: a state detection circuit for constructing an ac control loop, comprising: the device comprises a control module, an alternating current control module and a detection module;
the output end of the alternating current control module is connected with a load, the input end of the alternating current control module is connected with the control end of the control module, the detection end of the detection module is connected with the connection end of the load and the output end of the alternating current control module, and the signal output end of the detection module is connected with the input end of the control module;
the alternating current control module is used for outputting a driving signal to the load according to the alternating current control signal output by the control module;
the detection module is used for detecting the state of the alternating current control module and outputting a detection signal to the control module;
the control module is used for outputting an alternating current control signal to the alternating current control module and determining the state of the alternating current control module according to the detection signal.
In the state detection circuit of the ac control circuit, the ac control module includes: a first switch circuit, a first bias circuit and a second switch circuit;
the input end of the first switch circuit is connected with the control end of the control module, the output end of the first switch circuit is connected with the second end of the first bias circuit, the first end of the first bias circuit is connected with the live wire and the input end of the second switch circuit, the output end of the second switch circuit is connected with the load, and the reference end of the second switch circuit is connected with the third end of the first bias circuit.
In the state detection circuit of the ac control circuit of the present invention, the first switch circuit includes: a twelfth triode; the first bias circuit includes: thirty-ninth and forty-fourth resistors; the second switching circuit includes: silicon controlled rectifier;
the base electrode of the twelfth triode is connected with the control end of the control module, the emitting electrode of the twelfth triode is connected with a negative power supply, the collector electrode of the twelfth triode is connected with the second end of the fortieth resistor, the first end of the fortieth resistor is connected with the second end of the thirty-ninth resistor and is connected with the reference end of the controllable silicon, the first end of the thirty-ninth resistor and the input end of the controllable silicon are connected with the live wire, and the output end of the controllable silicon is connected with the load.
In the state detection circuit of the ac control circuit, the ac control module includes: a relay;
the input end of the relay is connected with the control end of the control module, and the output end of the relay is connected with the load.
In the state detection circuit of ac control loop, the detection module includes: a current limiting circuit and a third switching circuit;
the input end of the third switch circuit is connected with the live wire, the output end of the third switch circuit is connected with the input end of the control module, the control end of the third switch circuit is connected with the output end of the current limiting circuit, and the input end of the current limiting circuit is connected with the load.
In the state detection circuit of the ac control circuit, the detection module further includes: a reverse circuit prevention circuit;
the anti-reverse circuit is arranged between the current limiting circuit and the control end of the third switch circuit, the positive end of the anti-reverse circuit is connected with the control end of the third switch circuit, and the negative end of the anti-reverse circuit is connected with the input end of the current limiting circuit.
In the state detection circuit of the ac control circuit, the detection module further includes: a second bias circuit and a first filter circuit;
the first end of the second bias circuit is connected with the input end of the third switch circuit, the second end of the second bias circuit is connected with the control end of the third switch circuit, and the first filter circuit and the second bias circuit are arranged in parallel.
In the state detection circuit of the ac control circuit, the detection module further includes: the protection circuit and the second filter circuit are arranged between the output end of the third switch circuit and the input end of the control module;
the first end of the protection circuit is connected with the input end of the third switch circuit, and the second end of the protection circuit is connected with the control end of the third switch circuit;
the first end of the second filter circuit is connected with the output end of the third switch circuit, the second end of the second filter circuit is connected with the input end of the control module, and the third end of the second filter circuit is connected with a negative power supply.
In the state detection circuit of the ac control circuit, the current limiting circuit includes: a thirty-eighth resistor and a sixty-seventh resistor; the anti-reverse circuit includes: a first diode; the first filter circuit includes: a twenty-first capacitor; the second bias circuit includes: a thirty-fifth resistor; the protection circuit includes: a fifteenth diode; the third switching circuit includes: an eleventh triode and a thirty-sixth resistor; the second filter circuit includes: a thirty-seventh resistor and a thirty-third capacitor;
a first end of the thirty-eighth resistor is connected with the load, a second end of the thirty-eighth resistor is connected with the cathode of the first diode through the sixty-seventh resistor, and the anode of the first diode is connected with the base of the eleventh triode;
the anode of the fifteenth diode is connected with the base electrode of the eleventh triode, the cathode of the fifteenth diode is connected with the emitting electrode of the eleventh triode, and the emitting electrode of the eleventh triode is connected with the live wire; the thirty-fifth resistor and the twenty-first capacitor are sequentially connected with the fifteenth diode in parallel;
the collector of the eleventh triode is connected with a negative power supply through the thirty-sixth resistor, the collector of the eleventh triode is also connected with the first end of the thirty-seventh resistor, the second end of the thirty-seventh resistor is connected with the input end of the control module and the first end of the thirty-third capacitor, and the second end of the thirty-third capacitor is connected with the negative power supply.
The utility model also provides an electrical equipment, include: the state detection circuit of the alternating current control loop is described above.
Implement the utility model discloses a state detection circuitry and electrical equipment in alternating current control return circuit has following beneficial effect: the device comprises a control module, an alternating current control module and a detection module; the output end of the alternating current control module is connected with a load, the input end of the alternating current control module is connected with the control end of the control module, the detection end of the detection module is connected with the load, and the signal output end of the detection module is connected with the input end of the control module; the alternating current control module outputs a driving signal to a load according to the alternating current control signal; the detection module detects the state of the alternating current control module and outputs a detection signal to the control module; the control module outputs an alternating current control signal and determines the state of the alternating current control module according to the detection signal. The utility model discloses a simple circuit structure can realize carrying out on-line measuring to the state of AC control return circuit, and circuit, wiring are simple, effective reduce cost, and detect the good reliability.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a schematic block diagram of a state detection circuit of an ac control loop according to an embodiment of the present invention;
fig. 2 is a circuit diagram of a state detection circuit of an ac control loop according to an embodiment of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Referring to fig. 1, a schematic block diagram of an alternative embodiment of a state detection circuit of an ac control loop according to the present invention is shown. The state detection circuit of the alternating current control loop can be applied to electric equipment driven by alternating current, such as a water pump, an intelligent door lock, a heater, a water inlet valve, a motor, a fan, a washing machine (such as a roller washing machine) and the like.
Specifically, as shown in fig. 1, the state detection circuit of the ac control loop includes: a control module 10, an AC control module 20, and a detection module 30.
The output end of the alternating current control module 20 is connected with the load 40, the input end of the alternating current control module 20 is connected with the control end of the control module 10, the detection end of the detection module 30 is connected with the connection end of the output ends of the load 40 and the alternating current control module 20, and the signal output end of the detection module 30 is connected with the input end of the control module 10.
In the embodiment of the present invention, the ac control module 20 is used for outputting a driving signal to the load 40 according to the ac control signal outputted by the control module 10. Alternatively, the ac control module 20 may be implemented by using a switching device and a related driving circuit that can satisfy the medium and small power load 40. Alternatively, in other embodiments, such as a high power load 40, the ac control module 20 may be implemented as a relay.
The embodiment of the utility model provides an in, detection module 30 is used for detecting the state of AC control module 20 to output detected signal to control module 10.
Optionally, in the embodiment of the present invention, when the ac control module 20 is normal and turned on, the output end of the detection module 30 does not output a signal; when the ac control module 20 is not turned on, such as the ac control module 20 is short-circuited or open-circuited, the output terminal of the detection module 30 can detect a square wave signal, and the square wave signal is transmitted to the input terminal of the control module 10.
In the embodiment of the present invention, the control module 10 is used for outputting an ac control signal to the ac control module 20, and determining the state of the ac control module 20 according to the detection signal.
Optionally, in the embodiment of the present invention, the control module 10 determines the state of the ac control module 20 based on the detection signal of the output end of the detection module 30 in the on/off control process of the ac control module 20 by outputting the ac control signal to the ac control module 20.
Specifically, when the control module 10 controls the ac control module 20 to be turned on, if the output end of the detection module 30 outputs a square wave signal, it indicates that the ac control module 20 is not turned on, and therefore, it can be determined that the ac control module 20 is short-circuited or broken; if no signal is output from the output terminal of the detection module 30, it indicates that the ac control module 20 is in a conducting state, and at this time, it can be determined that the ac control module 20 is in a normal state.
Optionally, in the embodiment of the present invention, the control module 10 can be implemented by a single chip. Wherein, the singlechip that adopts can be the singlechip of current conventional arbitrary model or brand, the utility model discloses do not do specifically and restrict.
As shown in fig. 1, in some embodiments, the ac control module 20 includes: a first switch circuit 201, a first bias circuit 202, and a second switch circuit 203.
The input end of the first switch circuit 201 is connected to the control end of the control module 10, the output end of the first switch circuit 201 is connected to the second end of the first bias circuit 202, the first end of the first bias circuit 202 is connected to the live wire and the input end of the second switch circuit 203, the output end of the second switch circuit 203 is connected to the load 40, and the reference end of the second switch circuit 203 is connected to the third end of the first bias circuit 202.
Alternatively, as shown in fig. 2, the first switching circuit 201 includes: a twelfth triode Q12; the first bias circuit 202 includes: a thirty-ninth resistor R39 and a forty-fourth resistor R40; the second switch circuit 203 includes: a thyristor TR 3.
The base of the twelfth triode Q12 is connected to the control terminal of the control module 10, the emitter of the twelfth triode Q12 is connected to the negative power supply (as shown in-5V in fig. 2), the collector of the twelfth triode Q12 is connected to the second terminal of the forty-th resistor R40, the first terminal of the forty-th resistor R40 is connected to the second terminal of the thirty-ninth resistor R39 and to the reference terminal of the thyristor TR3, the first terminal of the thirty-ninth resistor R39 and the input terminal of the thyristor TR3 are connected to the hot wire (as shown in L in fig. 2, where L is also connected to the VCC port of the single chip), and the output terminal of the thyristor TR3 is connected to the load 40.
Alternatively, in some other embodiments, the ac control module 20 includes: a relay. The input end of the relay is connected with the control end of the control module 10, and the output end of the relay is connected with the load 40. That is, when the ac control module 20 is implemented by using a relay, it is not necessary to provide a switch driving circuit and a bias circuit.
As shown in fig. 1, in some embodiments, the detection module 30 includes: a current limiting circuit 301 and a third switching circuit 306.
The input end of the third switching circuit 306 is connected to the live wire, the output end of the third switching circuit 306 is connected to the input end of the control module 10, the control end of the third switching circuit 306 is connected to the output end of the current limiting circuit 301, and the input end of the current limiting circuit 301 is connected to the load 40.
Further, as shown in fig. 1, the detection module 30 further includes: the anti-reverse circuit 302.
The anti-reverse circuit 302 is arranged between the current limiting circuit 301 and the control end of the third switch circuit 306, the positive end of the anti-reverse circuit 302 is connected with the control end of the third switch circuit 306, and the negative end of the anti-reverse circuit 302 is connected with the input end of the current limiting circuit 301. By providing the anti-reverse circuit 302, a reverse signal can be prevented from being kicked back to the third switch circuit 306, and the device can be prevented from being burned out.
Further, as shown in fig. 1, the detection module 30 further includes: a second bias circuit 304 and a first filter circuit 303.
A first terminal of the second bias circuit 304 is connected to an input terminal of the third switch circuit 306, a second terminal of the second bias circuit 304 is connected to a control terminal of the third switch circuit 306, and the first filter circuit 303 is provided in parallel with the second bias circuit 304.
Further, as shown in fig. 1, the detection module 30 further includes: a protection circuit 305 and a second filter circuit 307 arranged between the output of the third switch circuit 306 and the input of the control module 10.
A first terminal of the protection circuit 305 is connected to an input terminal of the third switch circuit 306, and a second terminal of the protection circuit 305 is connected to a control terminal of the third switch circuit 306.
A first end of the second filter circuit 307 is connected to an output end of the third switch circuit 306, a second end of the second filter circuit 307 controls an input end of the module 10, and a third end of the second filter circuit 307 is connected to the negative power supply.
Optionally, as shown in fig. 2, in this embodiment, the current limiting circuit 301 includes: a thirty-eighth resistor R38 and a sixty-seventh resistor R67; the anti-reverse circuit 302 includes: a first diode D1; the first filter circuit 303 includes: a twenty-first capacitor C21; the second bias circuit 304 includes: a thirty-fifth resistance R35; the protection circuit 305 includes: a fifteenth diode D15; the third switching circuit 306 includes: an eleventh triode Q11 and a thirty-sixth resistor R36; the second filter circuit includes: a thirty-seventh resistor R37 and a thirty-third capacitor C33. The "control" in fig. 2 is an ac control signal output by the control end of the single chip, and the "detection" is a detection signal output by the detection module 30 and transmitted to the input end of the single chip.
A first end of the thirty-eighth resistor R38 is connected to the load 40, a second end of the thirty-eighth resistor R38 is connected to the cathode of the first diode D1 through the sixth seventeenth resistor R67, and the anode of the first diode D1 is connected to the base of the eleventh transistor Q11.
The anode of the fifteenth diode D15 is connected to the base of the eleventh triode Q11, the cathode of the fifteenth diode D15 is connected to the emitter of the eleventh triode Q11, and the emitter of the eleventh triode Q11 is connected to the hot line; a thirty-fifth resistor R35 and a twenty-first capacitor C21 are in turn connected in parallel with a fifteenth diode D15.
The collector of the eleventh triode Q11 is connected to the negative power supply through a thirty-sixth resistor R36, the collector of the eleventh triode Q11 is further connected to the first end of a thirty-seventh resistor R37, the second end of the thirty-seventh resistor R37 is connected to the input terminal of the control module 10 and the first end of a thirty-third capacitor C33, and the second end of the thirty-third capacitor C33 is connected to the negative power supply.
As shown in fig. 2, two resistors are used for current limiting, so that power can be shared while the current limiting function is achieved, power consumption is reduced, and reliability is enhanced.
As shown in fig. 2, by providing the first diode D1, a signal can be prevented from flowing back to the base of the eleventh transistor Q11, and the eleventh transistor Q11 can be prevented from being burned out. By providing the fifteenth diode D15, voltage fluctuation in the live line can be prevented from directly flowing into the base of the eleventh transistor Q11, and the base can be prevented from being damaged.
Further, as shown in fig. 2, the twenty-first capacitor C21 is provided for filtering, so that the signal at the base of the eleventh transistor Q11 can be more stable.
It should be noted that, in some other embodiments, the transistors (i.e., the transistors Q11 and Q12) in fig. 2 may be replaced by MOS transistors.
In some other embodiments, the present invention also provides an electrical device, including: the utility model discloses a state detection circuitry in AC control return circuit. Optionally, the electrical device includes, but is not limited to, a water pump, a smart door lock, a heater, a water inlet valve, a motor, a blower, and a washing machine (e.g., a drum washing machine).
The state detection circuit of the alternating current control loop can realize online detection of the state of the alternating current control loop through a simple circuit structure, has simple circuit and wiring, effectively reduces the cost, has good state detection reliability, and ensures safe, stable and reliable use of electrical equipment.
The above embodiments are only for illustrating the technical concept and features of the present invention, and the purpose of the embodiments is to enable people skilled in the art to understand the contents of the present invention and implement the present invention accordingly, which can not limit the protection scope of the present invention. All equivalent changes and modifications made within the scope of the claims of the present invention shall fall within the scope of the claims of the present invention.
Claims (10)
1. A state detection circuit for an ac control loop, comprising: the device comprises a control module, an alternating current control module and a detection module;
the output end of the alternating current control module is connected with a load, the input end of the alternating current control module is connected with the control end of the control module, the detection end of the detection module is connected with the connection end of the load and the output end of the alternating current control module, and the signal output end of the detection module is connected with the input end of the control module;
the alternating current control module is used for outputting a driving signal to the load according to the alternating current control signal output by the control module;
the detection module is used for detecting the state of the alternating current control module and outputting a detection signal to the control module;
the control module is used for outputting an alternating current control signal to the alternating current control module and determining the state of the alternating current control module according to the detection signal.
2. The state detection circuit of an ac control loop of claim 1, wherein the ac control module comprises: a first switch circuit, a first bias circuit and a second switch circuit;
the input end of the first switch circuit is connected with the control end of the control module, the output end of the first switch circuit is connected with the second end of the first bias circuit, the first end of the first bias circuit is connected with the live wire and the input end of the second switch circuit, the output end of the second switch circuit is connected with the load, and the reference end of the second switch circuit is connected with the third end of the first bias circuit.
3. The state detection circuit of an ac control loop according to claim 2, wherein the first switching circuit comprises: a twelfth triode; the first bias circuit includes: thirty-ninth and forty-fourth resistors; the second switching circuit includes: silicon controlled rectifier;
the base electrode of the twelfth triode is connected with the control end of the control module, the emitting electrode of the twelfth triode is connected with a negative power supply, the collector electrode of the twelfth triode is connected with the second end of the fortieth resistor, the first end of the fortieth resistor is connected with the second end of the thirty-ninth resistor and is connected with the reference end of the controllable silicon, the first end of the thirty-ninth resistor and the input end of the controllable silicon are connected with the live wire, and the output end of the controllable silicon is connected with the load.
4. The state detection circuit of an ac control loop of claim 1, wherein the ac control module comprises: a relay;
the input end of the relay is connected with the control end of the control module, and the output end of the relay is connected with the load.
5. The status detection circuit of an ac control loop according to claim 1, wherein the detection module comprises: a current limiting circuit and a third switching circuit;
the input end of the third switch circuit is connected with the live wire, the output end of the third switch circuit is connected with the input end of the control module, the control end of the third switch circuit is connected with the output end of the current limiting circuit, and the input end of the current limiting circuit is connected with the load.
6. The status detection circuit of an ac control loop of claim 5, wherein the detection module further comprises: an anti-reverse circuit;
the anti-reverse circuit is arranged between the current limiting circuit and the control end of the third switch circuit, the positive end of the anti-reverse circuit is connected with the control end of the third switch circuit, and the negative end of the anti-reverse circuit is connected with the input end of the current limiting circuit.
7. The status detection circuit of an ac control loop of claim 6, wherein the detection module further comprises: a second bias circuit and a first filter circuit;
the first end of the second bias circuit is connected with the input end of the third switch circuit, the second end of the second bias circuit is connected with the control end of the third switch circuit, and the first filter circuit and the second bias circuit are arranged in parallel.
8. The status detection circuit of an ac control loop of claim 7, wherein the detection module further comprises: the protection circuit and the second filter circuit are arranged between the output end of the third switch circuit and the input end of the control module;
the first end of the protection circuit is connected with the input end of the third switch circuit, and the second end of the protection circuit is connected with the control end of the third switch circuit;
the first end of the second filter circuit is connected with the output end of the third switch circuit, the second end of the second filter circuit is connected with the input end of the control module, and the third end of the second filter circuit is connected with a negative power supply.
9. The ac control loop status detection circuit of claim 8, wherein the current limiting circuit comprises: a thirty-eighth resistor and a sixty-seventh resistor; the anti-reverse circuit includes: a first diode; the first filter circuit includes: a twenty-first capacitor; the second bias circuit includes: a thirty-fifth resistor; the protection circuit includes: a fifteenth diode; the third switching circuit includes: an eleventh triode and a thirty-sixth resistor; the second filter circuit includes: a thirty-seventh resistor and a thirty-third capacitor;
a first end of the thirty-eighth resistor is connected with the load, a second end of the thirty-eighth resistor is connected with the cathode of the first diode through the sixty-seventh resistor, and the anode of the first diode is connected with the base of the eleventh triode;
the anode of the fifteenth diode is connected with the base electrode of the eleventh triode, the cathode of the fifteenth diode is connected with the emitting electrode of the eleventh triode, and the emitting electrode of the eleventh triode is connected with the live wire; the thirty-fifth resistor and the twenty-first capacitor are sequentially connected with the fifteenth diode in parallel;
the collector of the eleventh triode is connected with a negative power supply through the thirty-sixth resistor, the collector of the eleventh triode is also connected with the first end of the thirty-seventh resistor, the second end of the thirty-seventh resistor is connected with the input end of the control module and the first end of the thirty-third capacitor, and the second end of the thirty-third capacitor is connected with the negative power supply.
10. An electrical device, comprising: a state detection circuit for an ac control loop according to any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123031049.8U CN217060421U (en) | 2021-12-02 | 2021-12-02 | State detection circuit of alternating current control loop and electrical equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123031049.8U CN217060421U (en) | 2021-12-02 | 2021-12-02 | State detection circuit of alternating current control loop and electrical equipment |
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| Publication Number | Publication Date |
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| CN217060421U true CN217060421U (en) | 2022-07-26 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202123031049.8U Active CN217060421U (en) | 2021-12-02 | 2021-12-02 | State detection circuit of alternating current control loop and electrical equipment |
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| CN (1) | CN217060421U (en) |
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2021
- 2021-12-02 CN CN202123031049.8U patent/CN217060421U/en active Active
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